/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 11:10:44,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 11:10:44,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 11:10:44,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 11:10:44,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 11:10:44,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 11:10:44,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 11:10:44,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 11:10:44,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 11:10:44,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 11:10:44,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 11:10:44,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 11:10:44,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 11:10:44,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 11:10:44,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 11:10:44,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 11:10:44,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 11:10:44,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 11:10:44,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 11:10:44,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 11:10:44,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 11:10:44,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 11:10:44,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 11:10:44,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 11:10:44,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 11:10:44,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 11:10:44,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 11:10:44,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 11:10:44,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 11:10:44,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 11:10:44,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 11:10:44,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 11:10:44,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 11:10:44,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 11:10:44,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 11:10:44,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 11:10:44,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 11:10:44,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 11:10:44,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 11:10:44,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 11:10:44,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 11:10:44,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 11:10:44,279 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 11:10:44,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 11:10:44,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 11:10:44,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 11:10:44,281 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 11:10:44,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 11:10:44,282 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 11:10:44,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 11:10:44,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 11:10:44,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 11:10:44,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 11:10:44,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 11:10:44,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 11:10:44,283 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 11:10:44,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 11:10:44,283 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 11:10:44,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 11:10:44,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 11:10:44,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 11:10:44,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 11:10:44,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 11:10:44,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:10:44,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 11:10:44,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 11:10:44,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 11:10:44,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 11:10:44,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 11:10:44,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 11:10:44,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 11:10:44,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 11:10:44,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 11:10:44,591 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 11:10:44,597 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 11:10:44,599 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 11:10:44,599 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 11:10:44,600 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-10-13 11:10:44,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0777c1d76/9c55b03a2b8c4177b499076ee6c6cd26/FLAG088163178 [2020-10-13 11:10:45,048 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 11:10:45,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-10-13 11:10:45,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0777c1d76/9c55b03a2b8c4177b499076ee6c6cd26/FLAG088163178 [2020-10-13 11:10:45,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0777c1d76/9c55b03a2b8c4177b499076ee6c6cd26 [2020-10-13 11:10:45,481 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 11:10:45,483 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 11:10:45,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 11:10:45,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 11:10:45,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 11:10:45,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:10:45" (1/1) ... [2020-10-13 11:10:45,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc704b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:45, skipping insertion in model container [2020-10-13 11:10:45,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:10:45" (1/1) ... [2020-10-13 11:10:45,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 11:10:45,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 11:10:45,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:10:45,721 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 11:10:45,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:10:45,757 INFO L208 MainTranslator]: Completed translation [2020-10-13 11:10:45,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:45 WrapperNode [2020-10-13 11:10:45,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 11:10:45,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 11:10:45,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 11:10:45,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 11:10:45,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:45" (1/1) ... [2020-10-13 11:10:45,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:45" (1/1) ... [2020-10-13 11:10:45,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:45" (1/1) ... [2020-10-13 11:10:45,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:45" (1/1) ... [2020-10-13 11:10:45,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:45" (1/1) ... [2020-10-13 11:10:45,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:45" (1/1) ... [2020-10-13 11:10:45,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:45" (1/1) ... [2020-10-13 11:10:45,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 11:10:45,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 11:10:45,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 11:10:45,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 11:10:45,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:10:45,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 11:10:45,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 11:10:45,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 11:10:45,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 11:10:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 11:10:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 11:10:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 11:10:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 11:10:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 11:10:46,148 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 11:10:46,149 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 11:10:46,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:10:46 BoogieIcfgContainer [2020-10-13 11:10:46,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 11:10:46,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 11:10:46,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 11:10:46,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 11:10:46,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:10:45" (1/3) ... [2020-10-13 11:10:46,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222df1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:10:46, skipping insertion in model container [2020-10-13 11:10:46,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:10:45" (2/3) ... [2020-10-13 11:10:46,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222df1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:10:46, skipping insertion in model container [2020-10-13 11:10:46,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:10:46" (3/3) ... [2020-10-13 11:10:46,161 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-10-13 11:10:46,172 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 11:10:46,179 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 11:10:46,194 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 11:10:46,218 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 11:10:46,218 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 11:10:46,218 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 11:10:46,219 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 11:10:46,219 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 11:10:46,219 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 11:10:46,219 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 11:10:46,219 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 11:10:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-13 11:10:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 11:10:46,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:46,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:46,245 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:46,252 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-10-13 11:10:46,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:46,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265283859] [2020-10-13 11:10:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:46,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:46,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:46,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:46,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:10:46,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:10:46,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-13 11:10:46,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:46,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:46,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:10:46,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:46,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 11:10:46,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:46,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:46,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:46,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:10:46,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:46,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 11:10:46,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:46,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:46,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:46,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:46,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:10:46,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265283859] [2020-10-13 11:10:46,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:10:46,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 11:10:46,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206246636] [2020-10-13 11:10:46,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 11:10:46,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:46,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 11:10:46,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 11:10:46,555 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-10-13 11:10:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:46,573 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-13 11:10:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 11:10:46,575 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-13 11:10:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:46,581 INFO L225 Difference]: With dead ends: 30 [2020-10-13 11:10:46,582 INFO L226 Difference]: Without dead ends: 13 [2020-10-13 11:10:46,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 11:10:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-13 11:10:46,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-13 11:10:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 11:10:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-13 11:10:46,619 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-13 11:10:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:46,620 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-13 11:10:46,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 11:10:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-13 11:10:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 11:10:46,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:46,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:46,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 11:10:46,622 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:46,623 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-10-13 11:10:46,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:46,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758778470] [2020-10-13 11:10:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:46,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:46,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:46,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:46,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:10:46,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:10:46,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-13 11:10:46,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:46,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:10:46,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:10:46,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:10:46,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:10:46,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:46,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:46,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:46,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:10:46,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:46,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:10:46,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:46,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:46,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:46,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:46,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:10:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:10:46,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758778470] [2020-10-13 11:10:46,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:10:46,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 11:10:46,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094249488] [2020-10-13 11:10:46,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 11:10:46,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:46,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 11:10:46,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:10:46,722 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-10-13 11:10:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:46,760 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-13 11:10:46,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 11:10:46,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 11:10:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:46,761 INFO L225 Difference]: With dead ends: 24 [2020-10-13 11:10:46,762 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 11:10:46,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:10:46,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 11:10:46,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-13 11:10:46,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 11:10:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-13 11:10:46,768 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-10-13 11:10:46,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:46,768 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-13 11:10:46,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 11:10:46,769 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-13 11:10:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 11:10:46,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:46,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:46,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 11:10:46,776 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:46,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:46,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-10-13 11:10:46,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:46,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577423728] [2020-10-13 11:10:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:46,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:46,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:46,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:46,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 11:10:46,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:10:46,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-13 11:10:46,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:46,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:10:46,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:10:46,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 11:10:46,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:10:46,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:46,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:46,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:46,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:10:46,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:46,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:10:46,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:46,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:46,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:46,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:46,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:10:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:10:46,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577423728] [2020-10-13 11:10:46,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:10:46,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 11:10:46,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408270548] [2020-10-13 11:10:46,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 11:10:46,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:46,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 11:10:46,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:10:46,943 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-13 11:10:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:47,045 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-13 11:10:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 11:10:47,046 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-13 11:10:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:47,047 INFO L225 Difference]: With dead ends: 24 [2020-10-13 11:10:47,047 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 11:10:47,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:10:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 11:10:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-13 11:10:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 11:10:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-13 11:10:47,052 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-10-13 11:10:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:47,052 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-13 11:10:47,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 11:10:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-13 11:10:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 11:10:47,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:47,054 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:47,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 11:10:47,054 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:47,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:47,054 INFO L82 PathProgramCache]: Analyzing trace with hash 57842105, now seen corresponding path program 1 times [2020-10-13 11:10:47,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:47,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851094052] [2020-10-13 11:10:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:47,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:47,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:47,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:47,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:47,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 11:10:47,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:10:47,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-13 11:10:47,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:47,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:10:47,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:10:47,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 11:10:47,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:10:47,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:47,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:47,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:47,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:10:47,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:47,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:10:47,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:47,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:47,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:47,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:47,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:10:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:10:47,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851094052] [2020-10-13 11:10:47,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:47,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 11:10:47,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229318780] [2020-10-13 11:10:47,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:10:47,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:47,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:10:47,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:10:47,300 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-13 11:10:47,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:47,341 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-13 11:10:47,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:10:47,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-13 11:10:47,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:47,344 INFO L225 Difference]: With dead ends: 27 [2020-10-13 11:10:47,344 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 11:10:47,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:10:47,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 11:10:47,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-10-13 11:10:47,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 11:10:47,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-13 11:10:47,352 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2020-10-13 11:10:47,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:47,352 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-13 11:10:47,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:10:47,352 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-13 11:10:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 11:10:47,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:47,353 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:47,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 11:10:47,354 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:47,355 INFO L82 PathProgramCache]: Analyzing trace with hash 957094099, now seen corresponding path program 2 times [2020-10-13 11:10:47,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:47,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698893084] [2020-10-13 11:10:47,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:47,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:47,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:47,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:47,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:47,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:47,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:10:47,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:10:47,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-13 11:10:47,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:47,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:10:47,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:10:47,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 11:10:47,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:47,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:47,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:47,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:47,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:10:47,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:47,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:10:47,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:47,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:47,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:47,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:47,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:10:47,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698893084] [2020-10-13 11:10:47,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:47,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 11:10:47,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646781352] [2020-10-13 11:10:47,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 11:10:47,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:47,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 11:10:47,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:10:47,626 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-13 11:10:47,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:47,657 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-13 11:10:47,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 11:10:47,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-13 11:10:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:47,661 INFO L225 Difference]: With dead ends: 37 [2020-10-13 11:10:47,661 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 11:10:47,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:10:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 11:10:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-13 11:10:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 11:10:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-13 11:10:47,667 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2020-10-13 11:10:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:47,668 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-13 11:10:47,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 11:10:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-13 11:10:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 11:10:47,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:47,669 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:47,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 11:10:47,669 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:47,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:47,670 INFO L82 PathProgramCache]: Analyzing trace with hash -845939081, now seen corresponding path program 3 times [2020-10-13 11:10:47,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:47,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519266518] [2020-10-13 11:10:47,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:47,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:47,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:47,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:47,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:47,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:47,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 11:10:47,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:10:47,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-13 11:10:47,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:47,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:10:47,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 11:10:47,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:10:47,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:48,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:48,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:48,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:10:48,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:48,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:10:48,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:48,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:48,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:48,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:48,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:10:48,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519266518] [2020-10-13 11:10:48,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:48,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:10:48,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498379685] [2020-10-13 11:10:48,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:10:48,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:48,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:10:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:10:48,061 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-13 11:10:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:48,126 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-10-13 11:10:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 11:10:48,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 11:10:48,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:48,128 INFO L225 Difference]: With dead ends: 33 [2020-10-13 11:10:48,128 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 11:10:48,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:10:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 11:10:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-13 11:10:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 11:10:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-13 11:10:48,134 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 22 [2020-10-13 11:10:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:48,135 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-13 11:10:48,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:10:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-13 11:10:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 11:10:48,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:48,136 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:48,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 11:10:48,136 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:48,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1561760597, now seen corresponding path program 4 times [2020-10-13 11:10:48,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:48,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964380779] [2020-10-13 11:10:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:48,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:48,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 11:10:48,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:10:48,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-10-13 11:10:48,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:48,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:10:48,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 11:10:48,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:10:48,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:10:48,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:48,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:48,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:10:48,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:48,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:10:48,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:48,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:48,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:48,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:48,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:10:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 11:10:48,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964380779] [2020-10-13 11:10:48,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:48,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 11:10:48,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132306391] [2020-10-13 11:10:48,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:10:48,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:48,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:10:48,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:10:48,558 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-10-13 11:10:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:48,605 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-13 11:10:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:10:48,606 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-13 11:10:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:48,607 INFO L225 Difference]: With dead ends: 45 [2020-10-13 11:10:48,607 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 11:10:48,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:10:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 11:10:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 11:10:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 11:10:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-13 11:10:48,618 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-10-13 11:10:48,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:48,618 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-13 11:10:48,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:10:48,618 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-13 11:10:48,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 11:10:48,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:48,621 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:48,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 11:10:48,622 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:48,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:48,622 INFO L82 PathProgramCache]: Analyzing trace with hash 115125753, now seen corresponding path program 5 times [2020-10-13 11:10:48,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:48,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664967340] [2020-10-13 11:10:48,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:48,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:48,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 11:10:48,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:10:48,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-13 11:10:48,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:48,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:10:48,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 11:10:48,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:10:48,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:48,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:48,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:48,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:10:48,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:48,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:10:48,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:48,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:48,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:48,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:48,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 11:10:48,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664967340] [2020-10-13 11:10:48,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:48,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:10:48,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529890434] [2020-10-13 11:10:48,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:10:48,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:48,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:10:48,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:10:48,935 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2020-10-13 11:10:48,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:48,995 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-13 11:10:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:10:48,998 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 11:10:48,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:48,999 INFO L225 Difference]: With dead ends: 39 [2020-10-13 11:10:48,999 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 11:10:49,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:10:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 11:10:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-13 11:10:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 11:10:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-13 11:10:49,013 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 28 [2020-10-13 11:10:49,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:49,014 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-13 11:10:49,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:10:49,018 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-13 11:10:49,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 11:10:49,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:49,019 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:49,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 11:10:49,020 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:49,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:49,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1902732141, now seen corresponding path program 6 times [2020-10-13 11:10:49,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:49,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364867912] [2020-10-13 11:10:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:49,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:49,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:49,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:49,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 11:10:49,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:10:49,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-13 11:10:49,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:49,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:10:49,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 11:10:49,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:10:49,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:10:49,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:49,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:49,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:49,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 11:10:49,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:49,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:10:49,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:49,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:49,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:49,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:49,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:10:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 11:10:49,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364867912] [2020-10-13 11:10:49,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:49,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:10:49,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724288058] [2020-10-13 11:10:49,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:10:49,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:49,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:10:49,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:10:49,271 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-10-13 11:10:49,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:49,329 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-13 11:10:49,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:10:49,330 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-13 11:10:49,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:49,331 INFO L225 Difference]: With dead ends: 40 [2020-10-13 11:10:49,331 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 11:10:49,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:10:49,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 11:10:49,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 11:10:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 11:10:49,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-13 11:10:49,337 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2020-10-13 11:10:49,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:49,337 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-13 11:10:49,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:10:49,337 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-13 11:10:49,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 11:10:49,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:49,339 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:49,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 11:10:49,339 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:49,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:49,340 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 7 times [2020-10-13 11:10:49,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:49,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067440526] [2020-10-13 11:10:49,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 11:10:49,350 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 11:10:49,350 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 11:10:49,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 11:10:49,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 11:10:49 BoogieIcfgContainer [2020-10-13 11:10:49,370 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 11:10:49,373 INFO L168 Benchmark]: Toolchain (without parser) took 3889.59 ms. Allocated memory was 146.8 MB in the beginning and 242.7 MB in the end (delta: 95.9 MB). Free memory was 104.8 MB in the beginning and 199.4 MB in the end (delta: -94.6 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-13 11:10:49,374 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-13 11:10:49,375 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.51 ms. Allocated memory is still 146.8 MB. Free memory was 104.4 MB in the beginning and 95.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-10-13 11:10:49,376 INFO L168 Benchmark]: Boogie Preprocessor took 148.13 ms. Allocated memory was 146.8 MB in the beginning and 205.5 MB in the end (delta: 58.7 MB). Free memory was 95.3 MB in the beginning and 184.5 MB in the end (delta: -89.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-10-13 11:10:49,376 INFO L168 Benchmark]: RCFGBuilder took 243.54 ms. Allocated memory is still 205.5 MB. Free memory was 184.5 MB in the beginning and 173.1 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-10-13 11:10:49,377 INFO L168 Benchmark]: TraceAbstraction took 3216.99 ms. Allocated memory was 205.5 MB in the beginning and 242.7 MB in the end (delta: 37.2 MB). Free memory was 172.5 MB in the beginning and 199.4 MB in the end (delta: -26.9 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-10-13 11:10:49,381 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.51 ms. Allocated memory is still 146.8 MB. Free memory was 104.4 MB in the beginning and 95.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 148.13 ms. Allocated memory was 146.8 MB in the beginning and 205.5 MB in the end (delta: 58.7 MB). Free memory was 95.3 MB in the beginning and 184.5 MB in the end (delta: -89.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 243.54 ms. Allocated memory is still 205.5 MB. Free memory was 184.5 MB in the beginning and 173.1 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3216.99 ms. Allocated memory was 205.5 MB in the beginning and 242.7 MB in the end (delta: 37.2 MB). Free memory was 172.5 MB in the beginning and 199.4 MB in the end (delta: -26.9 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND FALSE !(i<=8) [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.1s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 103 SDtfs, 52 SDslu, 208 SDs, 0 SdLazy, 136 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 10 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 208 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 165 ConstructedInterpolants, 0 QuantifiedInterpolants, 6051 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 137/196 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...